<!DOCTYPE html>
<html>
  <head>
    <style>
      body {
        background: rgb(0, 0, 255);
      }
      @media (width: calc(10vw / 10px * 1000vh)) {
        body {
          background: rgb(255, 165, 0);
        }
      }
    </style>
  </head>
  <body></body>
</html>
